Rainbow-electronics ATtiny15L Manual de usuario descargar pdf (Pagina 27)

ATtiny15L

1187E–AVR–06/02

Figure 20. Timer/Counter0 Block Diagram

The Timer/Counter0 Control

• Bits 7..3 – Res: Reserved Bits

These bits are reserved bits in the ATtiny15L and always read as zero.

• Bits 2, 1, 0 – CS02, CS01, CS00: Clock Select0, Bits 2, 1 and 0

The Clock Select0 bits 2, 1 and 0 define the prescaling source of Timer0.

The Stop condition provides a Timer Enable/Disable function. The prescaled CK modes

are scaled directly from the CK Oscillator clock. If the external pin modes are used for

Timer/Counter0, transitions on PB2/(T0) will clock the counter even if the pin is config-

ured as an output. This feature can give the user SW control of counting.

OCIE1A

TOIE1

TOIE0

TOV0TOV0

CS02

CS01

CS00

TOV1

OCF1A

T/C CLK SOURCE

Bit 76543210

$33 –––––CS02 CS01 CS00 TCCR0

Read/Write RRRRRR/WR/WR/W

InitialValue00000000

Table 9. Clock 0 Prescale Select

CS02 CS01 CS00 Description

0 0 0 Stop, the Timer/Counter0 is stopped.

001CK

010CK/8

011CK/64

1 0 0 CK/256

1 0 1 CK/1024

1 1 0 External Pin T0, falling edge

1 1 1 External Pin T0, rising edge

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 82 83

Sin comentarios

Rainbow-electronics ATtiny15L Manual de usuario Pagina 27